Muscle contractions that normally move food along the human digestive system are known as

Correct Answer: C

Rationale: Peristalsis (C) is the rhythmic contraction moving food through the digestive tract. Defecation (A) is elimination, osmosis (B) is water movement, and circulation (D) is blood flow.

Correct Answer: A

Rationale: The pineal gland regulates sleep (A) via melatonin. Growth (B) is pituitary, milk production (C) is mammary glands, and inflammation (D) is not its role.

Correct Answer: C

Rationale: The epidermis has no hair follicles (C); they’re in the dermis. It has layers (A), no blood vessels (B), and melanin (D).

Correct Answer: C

Rationale: The dorsal cavity is posterior (C) to the ventral cavity (front). Medial (A) is midline, deep (B) is internal, and anterior (D) is front.

Correct Answer: C

Rationale: A herniated lumbar disc often compresses the sciatic nerve (C), causing leg pain. Radial (A) is arm, spinal cord (B) is central, and plantar (D) is foot.